A suicide bomber blew himself up outside a mosque on Friday, killing five people in Pakistan’s Taliban and Al-Qaeda infested tribal badlands on the Afghan border

A suicide bomber blew himself up outside a mosque on Friday, killing five people in Pakistan's Taliban and Al-Qaeda infested tribal badlands on the Afghan border, officials said.

"A suicide bomber blew himself up outside a Lashkar-i-Islam mosque. Three members of Lashkar-i-Islam and two passers-by have been killed in the attack. Nine people have been wounded in the incident," local administration official Bakhtiar Khan told media sources.

The attack came exactly three weeks after a similar suicide bombing at another Lashkar-i-Islam mosque in Tirah killed 22 people and wounded another 20 after Friday prayers.

Khyber is a haven for militants linked to the Pakistani Taliban and has been the scene of fighting between the army and rebels, prompting at least 18,000 people to flee their homes in October last year.

A spokesman for Lashkar-i-Islam blamed Pakistan's main umbrella Taliban faction for the attack.

The scene of Friday's attack is 12 kilometers (seven miles) from the site of the March 2 bombing, in which most of the dead were from Lashkar-i-Islam.

Extremist militants have killed more than 4,900 people across Pakistan since government troops raided an extremist mosque in Islamabad in July 2007.